Honed Limestone Cleaning Advice


Our builder never sealed our exterior honed limestone, and having gone through a winter and hurricane few months ago, the stone show a lot of water stains, and some black mold here and there. I tried few products, including StoneTech KlenzAll and few bleach based products from Home Depot, and none seemed to provide good results.

How do you guys suggest tackling this issue? I am thinking of using Simple Sherry with some bleach and buff the dark spots that the solution doesn’t remove. What’s your take?

Another picture.

Have you had a Pressure washing company take a look? They should know what to do.